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| Mirrors > Home > ILE Home > Th. List > jca | GIF version | ||
| Description: Deduce conjunction of the consequents of two implications ("join consequents with 'and'"). (Contributed by NM, 5-Aug-1993.) (Proof shortened by Wolf Lammen, 25-Oct-2012.) | 
| Ref | Expression | 
|---|---|
| jca.1 | ⊢ (𝜑 → 𝜓) | 
| jca.2 | ⊢ (𝜑 → 𝜒) | 
| Ref | Expression | 
|---|---|
| jca | ⊢ (𝜑 → (𝜓 ∧ 𝜒)) | 
| Step | Hyp | Ref | Expression | 
|---|---|---|---|
| 1 | jca.1 | . 2 ⊢ (𝜑 → 𝜓) | |
| 2 | jca.2 | . 2 ⊢ (𝜑 → 𝜒) | |
| 3 | pm3.2 139 | . 2 ⊢ (𝜓 → (𝜒 → (𝜓 ∧ 𝜒))) | |
| 4 | 1, 2, 3 | sylc 62 | 1 ⊢ (𝜑 → (𝜓 ∧ 𝜒)) | 
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